Beqiri

Bought my C43 last year and had it tuned a couple months ago, pushing around 420hp, I recently noticed that the car doesn’t really “go” until it shifts into second gear, almost feels like the power isn’t really there until second gear. This “problem” only occurs when starting for a stand still.
Appreciate any help that could shed a light on this matter

C43HeartBoost

I assume you have fully shut off traction control. If not, do that.

jonathan358

Pretty typical, first gear is all torque, no speed. Tuning helps to hold gear longer before gear shift to create more power, but it tops out in speed fast with how short the gearing is.

I think all these new cars with insanely short first gears are actually doing so to spool up the turbos more than anything. Also perhaps the theatrics caused by constant gear shifts for crackles/pops.

W205C43PFL

OP, I heard good experiences with the oil pump solenoid mod (unplugging) even with having a tuned car. Mine is not tuned but I immediately see differences in very positive ways after unplugging. Ultimately of course, it is up to you if you want to unplug it.

MatthewJ

Usually this symptom presents when the orifice oring on the vacuum controller fails. There is a small $50 replacement part that should correct. There are other posts about this as well.

Beqiri

Yes, traction control fully off. Told my tuner about this, and was told that I probably needs a TCU tune but I’m not sure since I don’t know so much about cars in general.